Abstract
To study viscoelastic properties of flexible macromolecules in dilute and semidilute solutions, a birefringence instrument with high sensitivity was constructed. A circularly polarized laser beam is used as an incident light, and the distortion of the beam by polymer molecules in shear flow was detected by a rotating half wave plate and photomultiplier and compensated with a Babinet–Soleil plate. The birefringence Δn and extinction angle χ of polymer solutions can be measured simultaneously and independently. The steady-shear viscosity η and steady-state compliance Je can be evaluated from observed values of Δn and χ using a stress-optical law. The reliability of these data was confirmed by comparing the data with those determined by a Maron–Krieger–Sisko capillary viscometer and a Weissenberg rheogoniometer. The concentration dependence of reduced steady-state compliance JeR of linear polystyrenes in bromobenzene (a matching solvent) in dilute and semidilute solutions are reported.
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Suzuki, F., Hori, K., Kozuka, N. et al. Measurements of Viscoelastic Properties of Linear Polymers in Dilute and Semidilute Solutions with a Flow Birefringence Method. Polym J 18, 911–917 (1986). https://doi.org/10.1295/polymj.18.911
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DOI: https://doi.org/10.1295/polymj.18.911
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